Abstract
Intergranular corrosion of welded joints using multi-strand winded welding wire was investigated using the double loop electrochemical potentiokinetic reactivation (DL-EPR) tests, intergranular corrosion tests and scanning Kelvin probe force microscopy (SKPFM) tests. The results revealed welded joint in high heat input and low cooling rate shows the highest DOS value, and undergoes the most important weight loss during intergranular corrosion tests. While welded joint in low heat input and cooling rate has the highest corrosion resistance. SKPFM also indicated that welded joint in the low cooling rate and heat input presents low potential and is not easy for electrochemical reaction.
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